A preparation method of sulfur and nitrogen co-doped thin nano-carbon sheets for supercapacitor electrodes
A technology of supercapacitors and nano-carbon sheets, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, chemical instruments and methods, etc., can solve problems such as unfavorable commercial applications, environmental pollution, and poor conductivity, and achieve Enrich the electrochemical active sites, reduce production costs, and enhance the activation effect
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Embodiment 1
[0030] (1) Pretreatment of cigarette butts: the cigarette butts are cleaned with deionized water to remove surface impurities, dried after washing, and then pulverized to obtain cigarette butt fibers.
[0031] (2) Preparation of sulfur and nitrogen co-doped thin nano-carbon sheets: Weigh 3 g of cigarette butt fibers obtained in step (1) and dissolve them in 150 ml of distilled water, then add 3.6 g of potassium hydroxide, 2.4 g of sodium hydroxide, and 3 g of thiourea and mix evenly Then put it in a rotary evaporator, stir at 80°C for 2.5 hours at a speed of 90r / min, evaporate to dryness, then transfer to a tube furnace, and raise the temperature to 800°C at a rate of 5°C / min under an Ar atmosphere. Incubate for 2 hours to obtain the activated product.
[0032] (3) Pickle the activated product obtained in step (2) with 2mol / L hydrochloric acid, then wash it with deionized water until pH = 7, place the washed porous carbon in a drying oven, and dry at a constant temperature of ...
Embodiment 2
[0034] (1) Pretreatment of cigarette butts: the cigarette butts are cleaned with deionized water to remove surface impurities, dried after washing, and then pulverized to obtain cigarette butt fibers.
[0035] (2) Preparation of sulfur and nitrogen co-doped thin nano-carbon sheets: Weigh 3 g of cigarette butt fibers obtained in step (1) and dissolve them in 150 ml of distilled water, then add 3.6 g of potassium hydroxide, 2.4 g of sodium hydroxide, and 6 g of thiourea and mix evenly Then put it in a rotary evaporator, stir at 80°C for 2.5 hours at a speed of 90r / min, evaporate to dryness, then transfer to a tube furnace, and raise the temperature to 700°C at a rate of 5°C / min under an Ar atmosphere. Incubate for 2 hours to obtain the activated product.
[0036] (3) Pickle the activated product obtained in step (2) with 2mol / L hydrochloric acid, then wash it with deionized water until pH = 7, place the washed porous carbon in a drying oven, and dry at a constant temperature of ...
Embodiment 3
[0038] (1) Pretreatment of cigarette butts: the cigarette butts are cleaned with deionized water to remove surface impurities, dried after washing, and then pulverized to obtain cigarette butt fibers.
[0039] (2) Preparation of sulfur and nitrogen co-doped thin nano-carbon sheets: Weigh 3 g of cigarette butt fibers obtained in step (1) and dissolve them in 150 ml of distilled water, then add 1.8 g of potassium hydroxide, 1.2 g of sodium hydroxide, and 3 g of thiourea and mix evenly Then put it in a rotary evaporator, stir at 80°C for 2.5 hours at a speed of 90r / min, evaporate to dryness, then transfer to a tube furnace, and raise the temperature to 600°C at a rate of 5°C / min under an Ar atmosphere. Incubate for 2 hours to obtain the activated product.
[0040] (3) Pickle the activated product obtained in step (2) with 2mol / L hydrochloric acid, then wash it with deionized water until pH = 7, place the washed porous carbon in a drying oven, and dry at a constant temperature of ...
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